Quantum physics, in short, shouldn’t be taken seriously as a theory of the way the world actually is. Instead, quantum physics is a mere tool, an instrument for predicting the outcomes of measurements. Yet, strangely, its unseriousness should be taken very seriously: in claiming their version of quantum physics as a “closed theory,” Heisenberg and Born were ruling out the possibility of an explanation of the quantum world, independent of observation, even in principle.
